High ISO static subjects situations usually.
What is the max ISO you would usually shoot with in high res mode?
I usually max my Auto ISO at 6400 with lowest speed set at 1/40s (I will go slower, but it has to then to be a conscious decision on my part of Speed vs Noise). Some people say ISO 6400 is nothing, but my experience dictates otherwise. While modern noise removal algorithms can work marvels, there is still a loss of fine details, which to me I find unacceptable above ISO 6400, especially in low light situations. Bright daylight will lead to more details being retained, but in low light the image deteriorates rather rapidly. I once by mistake shot landscapes almost an entire day at ISO 6400, and although it was easy to remove the noise, the loss of fine textural (grass, gravel, foliage) details was obvious. If your subject lacks texture and fine details, one can get away with higher ISO, but where fine details abound even ISO 400 is noticeably less detailed. Even at ISO 200, if I push the post processing beyond minor adjustments, I find noise removal becomes a necessity in my workflow.
Here are situations where I usually shoot HHHR ISO 6400
_______
Roger